Testing device



FIG. 1 is a top perspective view of a testing device with its cap off;

FIG. 2 is a bottom perspective view of the testing device with its cap off;

FIG. 3 is a bottom view of the testing device with its cap off;

FIG. 4 is a top view of the testing device with its cap off;

FIG. 5 is a left side view of the testing device with its cap off;

FIG. 6 is a right side view of the testing device with its cap off;

FIG. 7 is a front view of the testing device with its cap off;

FIG. 8 is a rear view of the testing device with its cap off;

FIG. 9 is a top perspective view of the testing device with its cap on;

FIG. 10 is a bottom perspective view of the testing device with its cap on;

FIG. 11 is a bottom view of the testing device with its cap on;

FIG. 12 is a top view of the testing device with its cap on;

FIG. 13 is a left side view of the testing device with its cap on;

FIG. 14 is a right side view of the testing device with its cap on;

FIG. 15 is a front view of the testing device with its cap on; and,

FIG. 16 is a rear view of the testing device with its cap on.

The broken lines in the figures depict portions of the testing device that form no part of the claimed design. 

CLAIM The ornamental design for a testing device, as shown and described. 